Raids within thoroughfares (7)
I believe the answer is:
inroads
'raids' is the definition.
(inroad can mean a raid or attack)
'within thoroughfares' is the wordplay.
'within' becomes 'in'.
'thoroughfares' becomes 'roads' (I've seen this in another clue).
'in'+'roads'='INROADS'
(Other definitions for inroads that I've seen before include "Encroachments" , "Progress" , "Hostile attacks" , "Sad iron (anag.)" , "(Make) raids, intrusions (into)" .)